Is there a way to create the list box style control found at the top of the form on this page?:
It seems like the multi-selection list box control only allows lists with checkboxes.
Yes, Infopath Drop-Down List Box control does/looks exactly the same
Yes, you are correct. Infopath Multiple-Selection List Box control permits selecting multiple items through rendered checkboxes only.
Seems like you refer to "control found at the top of the form on this page" as if permitting the multiple selections without checkboxes but it really permits there only single choices and is equal to Infopath Drop-Down List Box